Pan greasing machine



Nov. 27, 1951 Nov. 27, 1951 D'. J. PEEPs 2576535 PAN GREASING MACHINEFiled June 28, 1950 5 Sheets-Sheet 2 INVENTOR DoNALo J. PEEPs ATTO R NEY Nov. 27, 1951 D. J. FEI-:Ps 2,576,63s

PAN GREASING MACHINE Filed June- 28, 1950 5 Sheets-Sheet 4 V INVENTORDoNALD J. PEPs BY'QROW 4 ATTO R N EY Nov. 27, 1951 D. .1. PEEPS i2576538 PAN GREASING MACHINE Filed June' 28, 1950 s sheets-shem-l 5III/II;

INVENTOR DoNAL D J. PEEPs M BY ATTOR N EY Patented Nov. 27, 15951 PANGRESIN G MACHINE Donald J. reeps, Toledo, ohio; a'ssiegnor to `VThe DeVilbiss Company, Toledo, Ohio,'a"corporation of Ohio This' inventionrelates to a pan greasing machine for automatically applying'grease tothe inner surfaces of cake pans. In such machines cake pans of multiplecavity form are usually set in inverted position in an Opening of amovable carriage which is reciprocated over a spraying station. Becauseof the accumulation of grease upon the carriage and other parts -of themachine it is very desirable that the carriage be so mounted that it maybe tilted upwardly out of -its normal horizontal position. In th-ismanner the underside of the carriage and the upper surfaces of the tableupon which it reciprocates may be easily reached for Cleaning.

This invention relates to a machine of the general design and Operationas that described in U. S. Patent 2,350,708. I-Iowever, in this earlieirdesign the carria-ge is tiltable only with the table top upon which -itreciprocates. This assembly is heavy and is accordingly hard to raiseand may cause serious in-jury should it drop unexpectedly.

One object of the present invention is to iprovide a carriage whichalone is tiltable.

A further object is the provision of means for raising -and lookingthecarriage in its raised position.

Another object ofl the invention is to provide simple -reliable meansfor effecting the spray discharge in proper synchronism with thecarriage movement.

These and other objects and advantages Will become more apparent withreference given to the following specification and the accompanyingdrawings in which:

Fig. 1 is a front perspective view of a pan greasing machine embodyingmy invention;

Fig. 2 is front elevation thereof with the carriage in raised positionand the doors removed from the base housing;

Fig. 3 is a fragmentary plan view of the pan carriage and itsreciprocating driving means;

Fig. 4 is a fragmentary vertical section taken on the line 4-4 of Fig.3;

Fig. 5 is a side elevation of the carriage hinge and tilting' mechanismwith the carriage in its lowered position;

Fig. 6 is a rear elevation of the same elements with parts in section:

Fig. 7 is a side elevation of the carriage -h-inge and tilting mechanismwith the carriage in tilted position.

Fig. 8 is a vertical section of the valve controlling the'flow of air tothe carriage tilting air piston;

Fi'g. 9i`s a fragmentary' plan view of the shaft 2 lib'n which the'rfi'ispvtd, a hft "s'ppo'rting brackt, and the carriag roller assemblyproviding transvrse inbility "of the carriag'e tip'- dn the s'liaft; and

Fg. 10 is an'd view of the i'ollf assembly With a portion bi'le' Wa'yt'ishoivv the'k'e'yip'rjectifig fro'in the assembly into "a groove' ofthe shaft for providing the'pivtig C'onnc'tln' be; tween the shaft a'iidr'oll'er assembly.

Referrmg'in d't'afl to vthe drawm'gs, Figs. r and 2 the 1presente'inbodi' ent of the invention is illus'trat'e'd'as having a l'iie'rsupporti'ng'casin'g l which oonstitutes :a housing for operatio'naimoters and associated' mechani'siins. Upon the' ca'sin'g' I andextending froni' each VVend'is table supporting Structure' 2.Re'ciprooably mounted over the table'3 isicarriage 4. This' isrecipr'o'cated through the driving connection b'etweenchain and;bra'c'ket' i'nt'egrajl' with the' carria'gei; The

an idler'sprocke't "8. A'nrio'tor'`` Within the casing i is actuatinglyconnected with the driving sprocet' '|throu'gh" chain' 1* 'an'd vaxle II To"accommodatevarsidsignsof pansets, r'ee placeable shield members'such A:as li'are Secured by eccentric'headedturn bolts '|-3-to'a'rectangular openin'g in the carria'ge 4. The shield 122 -has openings1-4 adaptedl to outlinethe cavities of the' cake pans to be co'atd.Up-:throughflthese openngs M' thespray of grease'reaches the pancavities from spray `guns 15 withdischa-rge but-f lets within theopen-top'ped-surrfp*l 6.l V

The spray guns extend downward-ly'andfexteriorally from thefsu'mpf-IG'.The greaselreaches the spray uguns I-5, only Lone o'f which -is1's'hown.through a c'onduit Hifroinfia-pum'p I8. The-latter is driven by a motorI9. The main supply of-the grease is Originally placed- -with-inlthesu-rnp and is drawn theref'romf'by the v-pump `I3833thr`ough conduit251; An eleotric-heater `42'I eX-tends into the su'mp IAE to main-tainthe: circulatingfigreasei'at a proper spraying'co'nsistency;

Air for [atomizin'g the-grease reaches the spray guns through condu'it22. The' fl'ow vof air therethrough isvcontrolle'dby' valve 23. The airreaches theV valve through conduit 24 from the a-ir cleaner-andregulator25.. Pipin'gJZ Gco'n-nected toethe a-ir cleaner jan'dregulator VL25b'ri-ng's' in the a-ir from theoutside'supplysource; Connected to thepipijfi'g' is tubing'lZ-l which runs to'fdr'- Way'valve 2'8', a sectionof "Which'appears in Fi`gx8 This hand valve controls th'e'iair fiowv toan air cylinder 2392 (Figs. 5, H6 and 7) on the rear' side of'tl'iemachine which'fi actuatingly associaitd With the carriage for -tiltigthe latter.

The carriage 4 is supported along its forward edge by rollers 3 whichride upon a flat bar 3! fixed to frame members of the casing l and table3. Integral with the rear edge of the carriage 4 are supporting rollerassemblies 32 (Figs. 7, 9 and 10) Each roller assembly includes twoconcave faced rollers 33 and 34 with normally vertical axes which rideagainst opposite Sides of shaft 35. The assembly 32 also includes aroller 35 with a normally horizontal axis which rides along the uppersurface of shaft 35. This shaft is held in position by brackets 31 fixedto a horizontal frame member 38 of the machine. The brackets 31 have abearing contact with the shaft 35 permitting the latter to be turnedupon its longitudinal axis.

The shaft 35 has a lengthwisegroove or key way 39 within which a key 40held by a bolt 56 in each roller assembly 32 has a sliding fit.

A lever 4I is fixed at its upper end upon shaft 35 by key 42 andassociated'grooves in the lever and shaft. The lower end of the lever 4lis fastened,` through link 43, to the upper arm 44 of a rocker beam 45.The latter is oscillatably mounted through a trunnion axle portion 45upon bearings 41. The bearings 41 are Secured upon the outer ends ofcompanion angle irons 48 extending rearwardly from upright machine framemembers 49 and 50 to which the angle irons 48 are respectively welded.The lower arm 5! of the rocker beam 45 has a knuckle `ioint through apin 52 with the yoke ended collar 53 fixed to the end of piston rod 54.The air piston 55 is lodged within cylinder 29 which is supported upontrunnions 51 and 58 bearing in plates 59 and 66 which in turn are boltedto upright frame members 49 and 50.

Piston motivating air is delivered to and vented from opposite ends ofthe cylinder through tubings 6I and 62. As shown in Fig. 8 these tubingsare connected to 4-way valve 28 which is mounted for convenient manualoperaton on the left hand side of the front of the machine as may beseen in Fig. 2.

With the valve 28 in the position shown in Fig. 8 air from above thepiston is vented to the atmosphere through nipple 53 and air underpressure is delivered to the air cylinder 29 beneath the piston 55through tubing 62. Under these conditions the piston 55 `is forced toits uppermost position with the piston rod 54, lever 4I, link 43 androcker beam 45 positioned as shown in Figs. 5 and 6. With these parts soplaced the carriage 4 is in its normal lowered position with the bracket6 in engagement with the carriage driving chain 5.

When it is desired, after an Operating period of cake pan coating, totilt the carriage for Cleaning purposes the handle 64 of the valve 28 isswung to the dotted position shown in Fig. 8. The air below the pistonwill thus be released through tubing 62 and vent nipple 63, and airunder pressure is admitted to the cylinder, through tubing 6I, above thepiston and drives it downwardly to the other end of the cylinder. Whenthis occurs, as illustrated in Fig. 7, rocker beam 45, through itsconnection by collar yoke 53 with the end of the piston rod 54, ispivoted downwardly and lever 4l is turned clockwise through link 43. Aslever 4I is fixed to shaft 35 the latter is rotated by this levermovement. Through the keyed connection of the shaft 35 with the carriageroller assemblies 32, the turning of shaft 35 tilts the carriage to itsraised position as indicated in Fig. 7 and shown more fully in Fig. 2.

Because of the relative positions and interaction of lever 4I, link 43and rocker beam 45 as viewed in Fig. 7, the carriage 4 is locked inraised position and may not be lowered manually or through its ownweight: This is due to the fact that rocker beam 45 is prevented fromany further downward movementbecause of the piston being imposed againstthe lower end of the cylinder. Accordingly, any downward thrust of thecarriage is balked, as the joint between link 43 and lever 41 forms anangle which cannot be straightened out due to the fixed distance betweenthe outer end of'upper arm 44 of the rocker beam and the turning axis(the center line of shaft 35) of lever 4I. Consequently, downwardmovement of the carriage may be secured only through upwardV movement ofthe piston as controlled by air flow from four-way valve 28.

The locking effect does not intenfere with the lowering of the carriagethrough upward movement of the air piston. As the rocker beam 45 ispivoted upwardly the link 43 is first brought into substantially ahorizontal position by forcing a slight further clockwise movement oflever M. With further upward movement of beam 45 lever 4I is moved in acounter clockwise direction until the carriage reaches its downposition.

In order to prevent too rapid downward movement of the carriage suitableSpring or Shock absorber mechanism may be connected to beam 45. Thelowering speed of the carriage may also be slackened by a slowmanipulation of the valve 28.

As may be seen in Figs. 3 and 4 valve 23 is fastened to a bracket 66secured to a frame member of the machine. A pivoted valve actuating arm61 has a roller 68 on its end through which the arm is depressed byrotating cam 53. The latter is mounted on a shaft extending from speedreducing gear assembly 10.- The driving power for the cam is Securedfrom the shaft of idler sprocket 8 and the gear ratio is used whichcauses the air valve 23 to be actuated and the spray guns to be operatedonly when the pan shield 12 is passing over the sump during the travelof the carriage 4 to the left when viewing the machine from the frontthereof. During the return of the carriage to the right the valveremains closed and the spray guns accordingly inoperative.

In Figs. 3 and 4 the driving connection between the chain 5 and thecarriage is more fully disclosed. A tapered driving pin li fixed to thechain fits within a similarly tapered Opening in a hub 12. The latter isheld within the cross Opening in the bracket 6 formed by Ways 13 and 14bydiscs 15 and 16 fastened to the ends of hub. Bearing assemblies 11around the hub 12 afford the driving contact between the chain and thecarriage as they bear against the `ways 13 and 14 between which theyride as the pin 15 turns about the sprockets 1 and 8.

When the machine is being operated it is advisable to have a cover 18,as shown in Fig. 4, over the driving mechanism to keep the latter frombeing coated with grease. A similar hinged cover 19 is shown in Fig. 1along the rear edge of the machine. At the center of the back of themachine is a small exhaust canopy through which spray fumes are drawnfor discharge through an exhaust stack, the lower portion of which isindicated at 8 I.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent, is:

1. In a pan greasing machineV a reciprocably mounted pan carriage,meansifor reciprocating said carriage, an axially turnable shaft mountedalong one edge of said carriage, means fixedly attached to said carriageand having encompassing longitudinally slidng contact with said shaft,means for axially turning said shaft and catch means between the shaftand the carriage whereby the carriage is tilted upwardly on the axis ofthe shaft when the latter is axially turned.

2. A pan greasing machine as set forth in claim 1 in which the catchmeans includes a longitudlnal groove in the shaft and a key extendingfrom the carriage into the groove.

3. In a pan greasing machine a normally horizontal carriage forsupporting the pans to be greased, a shaft along the rear edge of thecarriage to which the carriage is latched, mounting for said shaftpermitting axial turning thereof for tilting the carriage, a verticalair cylinder positioned below said shaft, an air piston at the upper endof said cylinder when the carriage is in horizontal position,Connections for delivering compressed air alternately to opposite endsof the cylnder, a piston rod extending upwardly from said cylinder, alever fixed to said shaft and extending at an angle rearwardly and down-Wardly therefrom When the carriage is in a horizontal position, a bellcrank beam pivoted on an axis located rearwardly of the shaft at a levelmidway between the top of the cylinder and the shaft and substantiallyin line longitudinally of the lever when the carriage is in a horizontalposition, one arm of the beam extending above the outer "end of thelever when the carriage is in horizontal position, a link joining theends of said arm and lever, and a second arm of the beam extending belowthe lever and pivotally joined to the end of the piston rod, the variouselements being so dimensioned that When the piston is moved by airpressure to its lowermost position, the lever is brought downwardly to asubstantially vertical position tilting the carriage up-Wardly, theupper arm of the beam is swung to asub'stantially horizontal stoppedposition and the link joining the lever to the upper arm is angleddownwardly from the end of the lever to the end of the upper arm, andreturn movement of the lever through the weight of the carriage isprevented as the straightening of the link in line with the levernecessary for such movement is not possible with the upper arm of thebeam held against any further downward motion.

4. In a pan greasing machine a reciprocable pan carriage, a spray gunstationed to coat pans carried by said carriage, an endless chain havinga driving connection with said carriage, a driven sprocket and an idlersprocket upon which the chain is mounted, vertically depending shaf'tsfor said sprockets, driving means actuatingly connected to the shaft ofthe driven sprocket for reciprocating said carriage, a speed reducinggear assembly geared to one of said shafts, a rotating cam driven bysaid gear assembly, an air valve positioned adjacent the gear assemblyfor controlling the fiow of Operating air to the spray gun, and an airvalve motivating lever in fol1owing contact with said cam for periodicactuation thereby to operate the spray gun in predetermined relation tothe carriage reciprocation.

5. In a pan greasing machine a reciprocably mounted pan carriage, meansfor reciprocating said carriage, rollers along the forward edge of thecarriage on which the carriage is supported in its reciprocating motion,supporting roller assemblies fixed to the rearward edge of said carriageincluding opposed rollers upon normally vertical vaxes and an upperroller upon a normally horizontal axis, a shaft supported along therearward edge of the carriage and against the Sides and top of which therollers of the roller assemblies ride, means for turning said shaft uponits longitudinal axis, and catch means between the shaft and thecarriage Whereby the latter is tilted upon the axis of the shaft whenthe shaft is turned.

DONALD J. PEEPS.

REFERENCES CITED The following references are of record in the file ofthis patent:

` UNITED STATES PATENTS Number

